Bearing device for vehicle wheel

Patent metadata

Field	Value
Publication number	US-10343454-B2
Application number	US-201716085375-A
Country	US
Kind code	B2
Filing date	Mar 16, 2017
Priority date	Mar 18, 2016
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A bearing device for a vehicle wheel ( 1 ) includes: an outer ring ( 2 ), serving as an outer member; an inner member in which the inner member including a hub ring ( 3 ) that has an integral wheel mounting flange ( 3 B) to which a wheel is mounted, and at least one inner ring ( 4 ) that is press-fitted to a small-diameter step part ( 3 A) of the hub ring; ball rows ( 5 ) that are accommodated in a freely rolling manner; and a bottomed-tube-shaped cover ( 11 ) fitted to an inner-side opening ( 2 B) of the outer member. In order to retain grease enclosed between the outer member and the inner member near the ball rows, an outside damming member ( 11 D), which is formed of a ring-shaped elastic body extending radially inward, is provided at a side ( 11 A) of the cover.

First claim

The invention claimed is:

1. A bearing device for a vehicle wheel comprising:
an outer member in which double-row outer rolling surfaces are integrally formed on an inner periphery of the outer member;
an inner member including a hub wheel and at least one inner ring and having double-row inner rolling surfaces facing the double-row outer rolling surfaces on an outer periphery of the inner member, the hub wheel having a wheel mounting flange integrally formed for attaching a wheel at one end of the hub wheel and having a small diameter stepped portion extending axially on an outer periphery of the hub wheel, the inner ring being press-fitted to the small diameter stepped portion of the hub wheel;
double-row rolling elements rotatably accommodated between a rolling surface of the inner member and a rolling surface of the outer member;
a magnetic encoder provided at an end on an inner side of the inner member; and
a bottomed cylindrical cover fitted to an opening on an inner side of the outer member so as to face the magnetic encoder, wherein
the bearing device includes an outer blocking member formed of an annular elastic body extending radially inward at a side portion of the cover so as to retain a lubricant enclosed between the outer member and the inner member in vicinity of the rolling elements.

2. The bearing device according to claim 1 , wherein in order to retain the lubricant enclosed between the outer member and the inner member in the vicinity of the rolling elements, an inner blocking member is provided to face the outer blocking member, the inner blocking member being in an annular shape and extending radially outward from an entire periphery of an end portion of the fitting portion of the support ring.

3. The bearing device according to claim 2 , wherein the inner blocking member is formed of an annular elastic body extending radially outward from the end portion of the fitting portion of the support ring.

4. The bearing device according to claim 2 , wherein the inner blocking member is formed such that the end portion of the fitting portion of the support ring is bent radially outward.

5. The bearing device according to claim 1 , wherein the outer blocking member is provided on an axial end face of the side portion of the cover radially inside relative to an outer peripheral surface of the side portion, and a contact portion with the outer member is formed to protrude axially.

6. The bearing device according to claim 5 , wherein in order to retain the lubricant enclosed between the outer member and the inner member in the vicinity of the rolling elements, an inner blocking member is provided to face the outer blocking member, the inner blocking member being in an annular shape and extending radially outward from an entire periphery of an end portion of the fitting portion of the support ring.

7. The bearing device according to claim 6 , wherein the inner blocking member is formed of an annular elastic body extending radially outward from the end portion of the fitting portion of the support ring.

8. The bearing device according to claim 6 , wherein the inner blocking member is formed such that the end portion of the fitting portion of the support ring is bent radially outward.

9. The bearing device according to claim 1 , wherein the outer blocking member is configured to overlap a fitting portion of a support ring in an axial view, the support ring being fitted to an end portion on the inner side of the inner member and supporting the magnetic encoder.

10. The bearing device according to claim 9 , wherein in order to retain the lubricant enclosed between the outer member and the inner member in the vicinity of the rolling elements, an inner blocking member is provided to face the outer blocking member, the inner blocking member being in an annular shape and extending radially outward from an entire periphery of an end portion of the fitting portion of the support ring.

11. The bearing device according to claim 10 , wherein the inner blocking member is formed of an annular elastic body extending radially outward from the end portion of the fitting portion of the support ring.

12. The bearing device according to claim 10 , wherein the inner blocking member is formed such that the end portion of the fitting portion of the support ring is bent radially outward.

13. The bearing device according to claim 5 , wherein the outer blocking member is configured to overlap a fitting portion of a support ring in an axial view, the support ring being fitted to an end portion on the inner side of the inner member and supporting the magnetic encoder.

14. The bearing device according to claim 13 , wherein in order to retain the lubricant enclosed between the outer member and the inner member in the vicinity of the rolling elements, an inner blocking member is provided to face the outer blocking member, the inner blocking member being in an annular shape and extending radially outward from an entire periphery of an end portion of the fitting portion of the support ring.

15. The bearing device according to claim 14 , wherein the inner blocking member is formed of an annular elastic body extending radially outward from the end portion of the fitting portion of the support ring.

16. The bearing device according to claim 14 , wherein the inner blocking member is formed such that the end portion of the fitting portion of the support ring is bent radially outward.

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• Nakatsuji Yuta
• Nagai Natsuko

Classifications

• F16C41/00

  Other accessories, {e.g. devices integrated in the bearing not relating to the bearing function as such} · CPC title

• F16C33/80

  Labyrinth sealings {(F16C33/761 takes precedence)} · CPC title

• F16C33/66

  Special parts or details in view of lubrication · CPC title

• F16C19/38

  with two or more rows of rollers · CPC title

• F16C19/18

  with two or more rows of balls · CPC title